Assigetoe to zichaeb gtjibersom



Patented Jan. 6, 1920.

R 0 T N E V N STATES PATENT @EFllll PAUL ARBON, OF TULSA, OKLAHOMA,ASS'IGNOB TO RICHARD GTIIBERSON, 0F TULSA,

OKLAHOMA.

SAND-TRAP.

Application inea Api-i1 21, 191s.

To all whom t may concern:

Be it known that I, PAUL Anson, residing at Tulsa, in the county ofrlulsa and State of Oklahoma, a subject of Great Britain, have inventedor discovered certain new and useful Improvements in Sand-Traps, ofwhich improvements the following is a specification.

rlhe presence of float 'sand in most oil wells is the cause ofconsiderable labor and expense in the pumping of the oil, as the sandafter being carried past the foot valve at the bottom of the tubing willsettle down around the valve and retard or wholly prevent further flowof oil into the tubing. When the valve recessses are thus clogged, it isnecessary to pull the sucker rods and the tubing to remove theaccumulated sand. The laboi` and loss of production render thisoperation very expensive to the producer.

The object of the invention described herein is to provide means fortrapping a large percentage ofthe sand carried past the foot valve, andalso to provide for the removal of the foot valve with the workingbarrel when the operation of the valve is interfered with by anaccumulation of sand. The invention is hereinafter more fully describedand claimed.

In the accompanying drawing forming a part of this specification isshown in sectional elevation the lower portion of the tubing for a wellhaving combined therewith the improvements claimed herein.

ln the practice of the invention a trap chamber is connected to thelower end of the tubing 1 at a point below that portion of the tubing inwhich a pump barrel 2 of the usual or any suitable constructionoperates. This trap chamber is formed by a section of tubing 3preferably of a. diameter sub-A stantially greater than that of thetubing 1 and having its end portions swaged down so that they may beconnected to the lower end of the tubing 1 and to the anchor tube 4 bycoupling sleeves 5 and 6. The coupling 5 is of the type usually employedfor connecting the tubing sections, but the coupling 6 is provided witha diaphragm 7 having an opening therethrough to permit of the flow ofoil from the anchor tube. The edges of the opening are shaped to form aseat for the lower end of a hollow plug 8 which is connected by aythreaded sleeve 9 Specification of Letters Patent.

Patented Jan. 6, 1920.

Serial No. 291,582.

to the lower end of tube section l() having an external diameter lessthan the internal diameter of the tubing 1. The foot valve consists of aball or movable member 11 and a seat 12 which is supported by the plug8. In order to hold the ball in operative relation to the valve seat, apin 13 is passed through the tubing section l0 a short distance abovethe ball. A rod le having its upper end connected by a yoke 15 to thepump barrel 2 extends down into the tubing l0 a distance greater thanthe range of movement of the pump barrel when operated to remove oilfrom the well. @n the lower end of the rod is screwed a head 16 soconstructed as to permit the flow of oils past it but adapted to engagethe shoulder 17 and the upper end of the tubing section so that thelatter and the foot valve may be withdrawn from the well with the pumpbarrel. The tube section is perforated adjacent to its upper end topermit the ilow of oil into the trap chamber.

lt is characteristic of the improvement described and claimed hereinthat as the tube section 10 is substantially smaller than the tubing 1the oil will iiow with sul'iicient velocity through the tube section tocarriT a very large percentage of sand into the trap chamber in whichthe sand will have an opportunity to settle on account of its diameterbeing greater than that of the tubing and its length greater than therange of the pump barrel.

As the greater portion of the sand will pass into the trap chamber, theaccumulation of sand in the bottom of the tube sec tion 10 will be slowand when the valve bccomes clogged the tube section with the foot valvecan be withdrawn through the tubing 1 which need not be pulled.

l claim herein as my invention:

l. ln an apparatus for pumping wells the combination of a trap chamberadapted to be connected to the tubing and anchor tube, a movable tubesection of less diameter than the tubing of the well and projecting upinto the trap and adapted to discharge into the trap, a check valvecarried by the tube section and means whereby the tube section may beconnected to the working barrel of the well.

2. In an apparatus for pumping wells the combination of a trap sectionhaving a greater internal diameter than the tubing, means for connectingsaid chamber to the tubing, and the anchor section, a removable tubeseetion of less diameter than the nternal diameter of the tubing andprojecting up into the trap Chamber, a check valve carried by theremovable tube section, a movable rod adapted to engage the removablesection and adapted to be connected to the Working barrel of a Well. 10

In testimony whereof, I have hereunto' set my hand.

PAUL ARBON.

